<?php
/**
 * Created by PhpStorm.
 * User: zhangrxiang
 * Date: 2016/11/25
 * Time: 14:34
 */

$arr = "a";$arr[0]="b";
echo $arr;
echo $arr[0];
echo '1'.printf(2)+3;

echo "1as"+2;
$a = 0;
echo ~$a;echo 0500;print (196*100) !== (double)1960;